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Finding the Fourth Proportional to 121,636.18, 167,838.78 and 67,918.60

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Solution

The fourth proportional to 121,636.18, 167,838.78 and 67,918.60 is: 93,716.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,636.18 : 167,838.78 = 67,918.60 : x
  2. Step 2: Convert to fraction form
    121,636.18/167,838.78 = 67,918.60/x
  3. Step 3: Cross multiply
    121,636.18x = 167,838.78 × 67,918.60
  4. Step 4: Simplify right side
    121,636.18x = 11,399,374,963.31
  5. Step 5: Solve for x
    x = 11,399,374,963.31/121,636.18
  6. Step 6: Final answer
    x = 93,716.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.